/Engine/Source/Runtime/Analytics/Analytics/Public/AnalyticsPropertyStore.h
Iterates the keys currently stored and invokes the visitor function for each key, converting the value to its string representation.
virtual void VisitAll ( const [TFunction](API\Runtime\Core\GenericPlatform\TFunction)< void([FAnalyticsEventAttribute](API\Runtime\Analytics\FAnalyticsEventAttribute) &&)> & VisitFn ) const